code: def __getattr__(self, name):
      if name.startswith("_search_index_"):
          setattr(self, name, {})
      return getattr(self, name, {})
  
imports: import json
  import warnings
  from io import BytesIO
  import pytest
  from docutils import frontend, utils
  from docutils.parsers import rst
  from sphinx.search import IndexBuilder
label_desc: Use image node_id 2 for calling the DummyEnvironment obj's underlying member method code with example usage: obj.__getattr__(name) and returns: getattr